<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div {
            width: 200px;
            height: 50px;
            background-image: linear-gradient(
                    45deg,
                    orangered,
                    orange,
                    gold,
                    lightgreen,
                    cyan
            );
        }
    </style>
</head>
<body>
    <div></div>
</body>
</html>